If he sold us too the right buyer while also retaining our premier league status over the decades he has done a very good job.
There is a reason why only United, Liverpool, Arsenal, Chelsea and Spurs are the only clubs to never be relegated from the Premier League, our reason is Bill, money is there's, to have as as an ever present along with them is quite an achievement.
City, Newcastle, Villa, West Ham, Leeds Leicester, Blackburn, Southampton, Sunderland, Middlesbrough, Charlton.... etc would love a slice of that action
So staying in the Prem is your only objective? And Bill has been a success because of that well if that's your ambition there is no point conversing with you. Myself I'd rather we even attempted to win things like before Bill came here.